关键词: 发射组件, 相位非线性失真, 负载牵引, 阻抗匹配

Abstract: Phase nonlinear distortion has been attached more and more importance in wideband active phased array system，but most time transmit module run in saturation state, its power gain and phase display nonlinear compress. In this paper，a design method for improving phase nonlinear distortion are introduced. we research on nonlinear modeling of a power amplifier, using load-pull to find best linear impedance，and matching it to load impedance. Finally, test result show this design method can effectively improve phase nonlinear distortion of wideband transmit module.

Key words: transmit module, phase nonlinear distortion, load pull, impedance matching